This study was performed in the city of Asadabad and surrounding villages in order to detect species and prevalence of intestinal helminth as well as to determine the relation of some factors on the parasitic infections, e.g. age, sex, health centers, etc.

In this investigation , 2307 stool specimens were randomly collected from different age groups. They were examined with Formaline-Ether concentration method.

In Asadabad region, the infection rate has been 44.08% with one or more intestinal helminths. Infection rate of each helminth found in this study was: 32.38% for Ascaris lumbricoides, 9.49% for Hymenolepis nana, 6.55% for Trichuris trichura, 0.43% for Trichostrongylus spp., 5.11% for Enterobius vermicularis and 0.56% for taenia soginata.

In this survey, infection rate with Hymenolepis nana and Trichostrongylus spp. In plain villages have been significantly in mountain villages.

Infection prevalence didn’t show any significant difference in villages with and without health house.